Obama's 'Four More Years' Tweet is Most Popular of All Time [REPORT]

Four more years. twitter.com/BarackObama/st…— Barack Obama (@BarackObama) November 7, 2012

President Barack Obama's celebratory tweet after winning the U.S. election surpassed 500,000 retweets, making it the most retweeted post of all time, according to reports.

The tweet, which simply says, "Four more years," accompanies a photo of Obama and First Lady Michelle Obama embracing. At the time of writing, it garnered more than 510,000 retweets -- and that number is still rising rapidly. Both BuzzFeed and Mediabistro reported that Obama's victory tweet gets the "all-time" distinction.

Another tweet from Obama, in which he thanks his supporters, is also one of the most popular, having been retweeted more than 144,000 times.

We're all in this together. That's how we campaigned, and that's who we are. Thank you. -bo— Barack Obama (@BarackObama) November 7, 2012

Twitter is very guarded with information about most-popular tweets, so there's no official confirmation of the title-holder's identity. A tweet by Justin Bieber was thought to have set a record in September, but Mashable reporter Sam Laird found one by restaurant chain Wendy's that -- at the time -- gained more retweets (215,000) than the singer's post. Bieber's tweet now has more than 223,000 retweets.

The microblogging network has shared some new stats from Election Day as well. It reported that there were 31 million tweets about the event, peaking at 327,452 tweets per minute when the results of the election were called by media -- this makes this year's election the most-tweeted-about day in history by far.

Twitter did not immediately respond to a request for comment.